Finite Element Analysis of Equal Channel Multi-Angular Pressing (ECMAP)

摘要

In this paper, we studied the plastic deformation behavior of specimens during equal channel multi-angular pressing(ECMAP) which gave a total strain of approximately 2 on a single pass through the die, using the two dimensional rigid-plastic finite element method. The ECMAP process was explained in terms of two stages based on the corner filling procedure and the calculated load curve. Numerical simulations on annealed pure copper show that the first corner gap which occurred during stage I doesn't occur during stage II due to the back pressure effect developed by the second corner deformation. This back pressure effect results in the local severe shear at the bottom of the ECAP samples of the routes A and C. The strain distribution within the deformed samples using both the routes A and C of ECMAP becomes more homogeneous than that of the single pass ECAP.